a prominent republican senator is backing away from a no tax hike pledge. georgia senator told a group of republicans this weekend that he does not want washington to dictate how he votes and that his commitment is to his constituents. he's one of 39 senators who signed conservative activist norquist pledge but the looming fiscal cliff has caused several lawmakers to walk back from that promise. reliable sources is at the top of the hour. >>> the democratic republic of the congo is a nation the size of all of western europe. it may be in for a violent regime change as rebels have gained ground in recent weeks. congo was the setting for the heart of darkness and that hasn't lifted in 110 years since the story was public . 5.4 million people have died. jeff, why is it that the crisis seems to be heating up? you point out that the congo that the government's army is losing battle after battle. >> i think this is really an issue of state failure. i've been covering congo for six years and i've seen the country get weaker and weaker since i began. there was a bi